"usgcrp-ocpfy1991" . "Our Changing Planet. The U.S. Global Change Research Program for Fiscal Year 1991"^^ . "1991"^^ . "https://downloads.globalchange.gov/ocp/ocp1991/ocp1991.pdf"^^ . "A report by the U.S. Global Change Research Program and the Subcommittee on Global Change Research. A supplement to the President's Fiscal Year 1991 Budget. Published 1990."^^ . "report" . . . . _:genid1 . _:genid1 . _:genid1 . _:genid1 . _:genid2 . _:genid2 . _:genid2 . _:genid2 .